CVE-2021-23937

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This DNS lookup can be engineered to overload an internal DNS server or to slow down request processing of the Apache Wicket application causing a possible denial of service on either the internal infrastructure or the web application itself. This issue affects Apache Wicket Apache Wicket 9.x version 9.2.0 and prior versions; Apache Wicket 8.x version 8.11.0 and prior versions; Apache Wicket 7.x version 7.17.0 and prior versions and Apache Wicket 6.x version 6.2.0 and later versions."}], "problemTypes": [{"descriptions": [{"description": "DNS proxy and possible amplification attack", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-05-26T16:06:16.000Z", "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://lists.apache.org/thread.html/rc2ef22f90793e158cef65a7e370cdbca023c499d1403d65feeca870d%40%3Cusers.wicket.apache.org%3E"}, {"name": "[wicket-announce] 20210526 Re: CVE-2021-23937: Apache Wicket: DNS proxy and possible amplification attack", "tags": ["mailing-list", "x_refsource_MLIST"], "url": "https://lists.apache.org/thread.html/r127c0c1f3cb71e5bc619ad1e4b898b97c49758d1f20a54042966473e%40%3Cannounce.wicket.apache.org%3E"}, {"name": "[wicket-users] 20210526 Re: CVE-2021-23937: Apache Wicket: DNS proxy and possible amplification attack", "tags": ["mailing-list", "x_refsource_MLIST"], "url": "https://lists.apache.org/thread.html/r127c0c1f3cb71e5bc619ad1e4b898b97c49758d1f20a54042966473e%40%3Cusers.wicket.apache.org%3E"}, {"name": "[wicket-dev] 20210526 Re: CVE-2021-23937: Apache Wicket: DNS proxy and possible amplification attack", "tags": ["mailing-list", "x_refsource_MLIST"], "url": "https://lists.apache.org/thread.html/r8ccbd91b56ebf045d151bd4282bfeea7842a0698a0b76118fca8fe78%40%3Cdev.wicket.apache.org%3E"}], "source": {"discovery": "UNKNOWN"}, "title": "DNS proxy and possible amplification attack", "workarounds": [{"lang": "en", "value": "Sanitize the X-Forwarded-For header by running an Apache Wicket application behind a reverse HTTP proxy. This proxy should put the client IP address in the X-Forwarded-For header and not pass through the contents of the header as received by the client."}], "x_generator": {"engine": "Vulnogram 0.0.9"}, "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security@apache.org", "ID": "CVE-2021-23937", "STATE": "PUBLIC", "TITLE": "DNS proxy and possible amplification attack"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Apache Wicket", "version": {"version_data": [{"version_affected": "<=", "version_name": "Apache Wicket 9.x", "version_value": "9.2.0"}, {"version_affected": "<=", "version_name": "Apache Wicket 8.x", "version_value": "8.11.0"}, {"version_affected": "<=", "version_name": "Apache Wicket 7.x", "version_value": "7.17.0"}, {"version_affected": ">=", "version_name": "Apache Wicket 6.x", "version_value": "6.2.0"}]}}]}, "vendor_name": "Apache Software Foundation"}]}}, "credit": [{"lang": "eng", "value": "Apache Wicket would like to thank Jonathan Juursema from Topicus.Healthcare for reporting this issue."}], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "A DNS proxy and possible amplification attack vulnerability in WebClientInfo of Apache Wicket allows an attacker to trigger arbitrary DNS lookups from the server when the X-Forwarded-For header is not properly sanitized. This DNS lookup can be engineered to overload an internal DNS server or to slow down request processing of the Apache Wicket application causing a possible denial of service on either the internal infrastructure or the web application itself. This issue affects Apache Wicket Apache Wicket 9.x version 9.2.0 and prior versions; Apache Wicket 8.x version 8.11.0 and prior versions; Apache Wicket 7.x version 7.17.0 and prior versions and Apache Wicket 6.x version 6.2.0 and later versions."}]}, "generator": {"engine": "Vulnogram 0.0.9"}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "DNS proxy and possible amplification attack"}]}]}, "references": {"reference_data": [{"name": "https://lists.apache.org/thread.html/rc2ef22f90793e158cef65a7e370cdbca023c499d1403d65feeca870d%40%3Cusers.wicket.apache.org%3E", "refsource": "MISC", "url": "https://lists.apache.org/thread.html/rc2ef22f90793e158cef65a7e370cdbca023c499d1403d65feeca870d%40%3Cusers.wicket.apache.org%3E"}, {"name": "[wicket-announce] 20210526 Re: CVE-2021-23937: Apache Wicket: DNS proxy and possible amplification attack", "refsource": "MLIST", "url": "https://lists.apache.org/thread.html/r127c0c1f3cb71e5bc619ad1e4b898b97c49758d1f20a54042966473e@%3Cannounce.wicket.apache.org%3E"}, {"name": "[wicket-users] 20210526 Re: CVE-2021-23937: Apache Wicket: DNS proxy and possible amplification attack", "refsource": "MLIST", "url": "https://lists.apache.org/thread.html/r127c0c1f3cb71e5bc619ad1e4b898b97c49758d1f20a54042966473e@%3Cusers.wicket.apache.org%3E"}, {"name": "[wicket-dev] 20210526 Re: CVE-2021-23937: Apache Wicket: DNS proxy and possible amplification attack", "refsource": "MLIST", "url": "https://lists.apache.org/thread.html/r8ccbd91b56ebf045d151bd4282bfeea7842a0698a0b76118fca8fe78@%3Cdev.wicket.apache.org%3E"}]}, "source": {"discovery": "UNKNOWN"}, "work_around": [{"lang": "en", "value": "Sanitize the X-Forwarded-For header by running an Apache Wicket application behind a reverse HTTP proxy. This proxy should put the client IP address in the X-Forwarded-For header and not pass through the contents of the header as received by the client."}]}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T19:14:09.890Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://lists.apache.org/thread.html/rc2ef22f90793e158cef65a7e370cdbca023c499d1403d65feeca870d%40%3Cusers.wicket.apache.org%3E"}, {"name": "[wicket-announce] 20210526 Re: CVE-2021-23937: Apache Wicket: DNS proxy and possible amplification attack", "tags": ["mailing-list", "x_refsource_MLIST", "x_transferred"], "url": "https://lists.apache.org/thread.html/r127c0c1f3cb71e5bc619ad1e4b898b97c49758d1f20a54042966473e%40%3Cannounce.wicket.apache.org%3E"}, {"name": "[wicket-users] 20210526 Re: CVE-2021-23937: Apache Wicket: DNS proxy and possible amplification attack", "tags": ["mailing-list", "x_refsource_MLIST", "x_transferred"], "url": "https://lists.apache.org/thread.html/r127c0c1f3cb71e5bc619ad1e4b898b97c49758d1f20a54042966473e%40%3Cusers.wicket.apache.org%3E"}, {"name": "[wicket-dev] 20210526 Re: CVE-2021-23937: Apache Wicket: DNS proxy and possible amplification attack", "tags": ["mailing-list", "x_refsource_MLIST", "x_transferred"], "url": "https://lists.apache.org/thread.html/r8ccbd91b56ebf045d151bd4282bfeea7842a0698a0b76118fca8fe78%40%3Cdev.wicket.apache.org%3E"}]}]}, "cveMetadata": {"assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "assignerShortName": "apache", "cveId": "CVE-2021-23937", "datePublished": "2021-05-25T08:05:10.000Z", "dateReserved": "2021-01-13T00:00:00.000Z", "dateUpdated": "2024-08-03T19:14:09.890Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "Apache Wicket", "vendor": "Apache Software Foundation", "versions": [{"lessThanOrEqual": "9.2.0", "status": "affected", "version": "Apache Wicket 9.x", "versionType": "custom"}, {"lessThanOrEqual": "8.11.0", "status": "affected", "version": "Apache Wicket 8.x", "versionType": "custom"}, {"lessThanOrEqual": "7.17.0", "status": "affected", "version": "Apache Wicket 7.x", "versionType": "custom"}, {"lessThan": "Apache Wicket 6.x*", "status": "affected", "version": "6.2.0", "versionType": "custom"}]}], "source": "security@apache.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:apache:wicket:*:*:*:*:*:*:*:*", "matchCriteriaId": "3D5643CD-3063-4900-9EB7-86470C8C1384", "versionEndIncluding": "6.2.0", "versionStartIncluding": "6.0.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:apache:wicket:*:*:*:*:*:*:*:*", "matchCriteriaId": "7793CFFA-F876-4DD4-8E2F-C34FBB79FC47", "versionEndIncluding": "7.17.0", "versionStartIncluding": "7.0.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:apache:wicket:*:*:*:*:*:*:*:*", "matchCriteriaId": "02FE0D40-F64F-4EDA-B650-9AB6A13F5190", "versionEndIncluding": "8.11.0", "versionStartIncluding": "8.0.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:apache:wicket:*:*:*:*:*:*:*:*", "matchCriteriaId": "A4009313-BE49-4B49-A890-59FDE9D9E0C1", "versionEndIncluding": "9.2.0", "versionStartIncluding": "9.0.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A DNS proxy and possible amplification attack vulnerability in WebClientInfo of Apache Wicket allows an attacker to trigger arbitrary DNS lookups from the server when the X-Forwarded-For header is not properly sanitized. This DNS lookup can be engineered to overload an internal DNS server or to slow down request processing of the Apache Wicket application causing a possible denial of service on either the internal infrastructure or the web application itself. This issue affects Apache Wicket Apache Wicket 9.x version 9.2.0 and prior versions; Apache Wicket 8.x version 8.11.0 and prior versions; Apache Wicket 7.x version 7.17.0 and prior versions and Apache Wicket 6.x version 6.2.0 and later versions."}, {"lang": "es", "value": "Un proxy DNS y una posible vulnerabilidad de ataque de amplificaci\u00f3n en WebClientInfo de Apache Wicket permiten que un atacante active b\u00fasquedas de DNS arbitrarias desde el servidor cuando el encabezado X-Fordered-For no se sanea correctamente.&#xa0;Esta b\u00fasqueda de DNS puede ser dise\u00f1ada para sobrecargar un servidor DNS interno o para ralentizar el procesamiento de peticiones de la aplicaci\u00f3n Apache Wicket, lo que provoca una posible Denegaci\u00f3n de Servicio en la infraestructura interna o en la propia aplicaci\u00f3n web.&#xa0;Este problema afecta a Apache Wicket Apache Wicket 9.x versiones 9.2.0 y anteriores;&#xa0;Apache Wicket 8.x versiones 8.11.0 y anteriores;&#xa0;Apache Wicket 7.x versiones 7.17.0 y anteriores y Apache Wicket 6.x versiones 6.2.0 y posteriores"}], "id": "CVE-2021-23937", "lastModified": "2026-06-17T03:39:03.293", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-05-25T17:15:08.187", "references": [{"source": "security@apache.org", "url": "https://lists.apache.org/thread.html/r127c0c1f3cb71e5bc619ad1e4b898b97c49758d1f20a54042966473e%40%3Cannounce.wicket.apache.org%3E"}, {"source": "security@apache.org", "url": "https://lists.apache.org/thread.html/r127c0c1f3cb71e5bc619ad1e4b898b97c49758d1f20a54042966473e%40%3Cusers.wicket.apache.org%3E"}, {"source": "security@apache.org", "url": "https://lists.apache.org/thread.html/r8ccbd91b56ebf045d151bd4282bfeea7842a0698a0b76118fca8fe78%40%3Cdev.wicket.apache.org%3E"}, {"source": "security@apache.org", "tags": ["Mailing List", "Release Notes", "Vendor Advisory"], "url": "https://lists.apache.org/thread.html/rc2ef22f90793e158cef65a7e370cdbca023c499d1403d65feeca870d%40%3Cusers.wicket.apache.org%3E"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.apache.org/thread.html/r127c0c1f3cb71e5bc619ad1e4b898b97c49758d1f20a54042966473e%40%3Cannounce.wicket.apache.org%3E"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.apache.org/thread.html/r127c0c1f3cb71e5bc619ad1e4b898b97c49758d1f20a54042966473e%40%3Cusers.wicket.apache.org%3E"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.apache.org/thread.html/r8ccbd91b56ebf045d151bd4282bfeea7842a0698a0b76118fca8fe78%40%3Cdev.wicket.apache.org%3E"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Release Notes", "Vendor Advisory"], "url": "https://lists.apache.org/thread.html/rc2ef22f90793e158cef65a7e370cdbca023c499d1403d65feeca870d%40%3Cusers.wicket.apache.org%3E"}], "sourceIdentifier": "security@apache.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-200"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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